Originally Posted by
rccardr
Bill- That RD will happily shift a 6-7-8-9-10 speed cassette of up to 28 teeth when paired with the appropriate indexing shifter...
6-Speed SIS derailers should not be used with indexed 8, 9 or 10s shifters of any type.
The shift to the largest cog will not index quite right. It's not an issue of the derailer's travel limits, but that the actuation ratio does not remain linear, so there will be hesitation and/or noise when trying to use the largest cog.